Hi Nino
Yes, that's the post I was looking at, but my broswer wouldn't open the link.
Tried on my phone though, and now I can see it!
Thanks!
Yes, that's the post I was looking at, but my broswer wouldn't open the link.
Tried on my phone though, and now I can see it!
Thanks!
Continued experiments with DAC:
1. Around ak4339 soldered caps rfs 220uf (RFS-25V221MI5) and 4 smd caps.
2. After regulators LM317/LM337 soldered rfs 1000uf (RFS-25V102MJ8).
3. Finalize own controls power (tps7a4700) to the analog power DACs added after mc7806 capacitors 220uf rfs and murata 0.1uf.
The result is positive.
1. Around ak4339 soldered caps rfs 220uf (RFS-25V221MI5) and 4 smd caps.
2. After regulators LM317/LM337 soldered rfs 1000uf (RFS-25V102MJ8).
3. Finalize own controls power (tps7a4700) to the analog power DACs added after mc7806 capacitors 220uf rfs and murata 0.1uf.
The result is positive.
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Hi guys, I have a problem with my Weiliang dual AKM4399 DAC.
I bought it with the usb input, but it was very flimsy, and it was sufficient to simply tap or move the DAC to lose the usb signal. I talked with the seller, Yao, and he suggested I could solder the usb board to the pins. I did so, but it still cannot be recognized. The PC sees the usb device, but the usb device cannot be recognized. It's the same behaviour that was occurring very often when the usb was flimsily connected without being soldered.
Can anyone help me? Do all the pins of the XMOS card have to be connected to the socket, or perhaps one or two of them don't have to?
Is there a schematic for the connection of the XMOS usb card?
Thanks for everyone willing to help....
Tony
I bought it with the usb input, but it was very flimsy, and it was sufficient to simply tap or move the DAC to lose the usb signal. I talked with the seller, Yao, and he suggested I could solder the usb board to the pins. I did so, but it still cannot be recognized. The PC sees the usb device, but the usb device cannot be recognized. It's the same behaviour that was occurring very often when the usb was flimsily connected without being soldered.
Can anyone help me? Do all the pins of the XMOS card have to be connected to the socket, or perhaps one or two of them don't have to?
Is there a schematic for the connection of the XMOS usb card?
Thanks for everyone willing to help....
Tony
It's not a problem of device driver (which I have and I have correctly installed). It's a problem of pinouts on the board between the xmos card and the socket.
It used to work with usb earlier (although it was sufficient to even touch the dac to have the pc stop recognizing it). Now it's not working anymore after having soldering it directly like suggested by the seller.
Maybe certain pins should not be soldered, or maybe certain pins should be shorted? I don't know, hence I am asking. I have asked the question to Mihn Yao (the seller) but so far he hasn't answered, and it's been weeks.
It used to work with usb earlier (although it was sufficient to even touch the dac to have the pc stop recognizing it). Now it's not working anymore after having soldering it directly like suggested by the seller.
Maybe certain pins should not be soldered, or maybe certain pins should be shorted? I don't know, hence I am asking. I have asked the question to Mihn Yao (the seller) but so far he hasn't answered, and it's been weeks.
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A problem with the USB cable perhaps? Try another one.
Could also be related to power supply of the XMOS board, check the +5V or try adding a capacitor for proper decoupling.
Could also be related to power supply of the XMOS board, check the +5V or try adding a capacitor for proper decoupling.
If you have the 7pin xmos pcb, then all pins should be soldered to the 7pin
receptacle of the dac board. My friend has the same problem but his dac is the
weiliang es9018. He just resoldered all the connections to the USB connector and
USB card.
I just found this pin functions of the 7pin and 10pin xmos card from the net.
---10 pins: 1 (VBUSE); 2(USB-DM) ; 3(USB-DP) ; 4 ; 5(GND) ; 6(GND) ; 7(LRCK); 8(DATA); 9(BCK); 10 (MCK)
---7 pins: 1 (VBUSE); 2(USB-DM) ; 3(USB-DP) ; 4 ; 5(S1) ; 6(GND) ; 7(S1A)
(S1 is coaxial signal out, and regarding the S1A, just leave it there)
receptacle of the dac board. My friend has the same problem but his dac is the
weiliang es9018. He just resoldered all the connections to the USB connector and
USB card.
I just found this pin functions of the 7pin and 10pin xmos card from the net.
---10 pins: 1 (VBUSE); 2(USB-DM) ; 3(USB-DP) ; 4 ; 5(GND) ; 6(GND) ; 7(LRCK); 8(DATA); 9(BCK); 10 (MCK)
---7 pins: 1 (VBUSE); 2(USB-DM) ; 3(USB-DP) ; 4 ; 5(S1) ; 6(GND) ; 7(S1A)
(S1 is coaxial signal out, and regarding the S1A, just leave it there)
Thanks guys. Systeme, Thanks for the information you wrote down. I how it will work... but I am not sure, I will let you gius know. Actually I have taken some pictures I can show you, hoping they can be useful.
The xmos card is soldered in oblique way because I was having some problems otherwise.
The xmos card is soldered in oblique way because I was having some problems otherwise.
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Could be one of the pins are shorted or a cold solder joint causing the xmos board not being recognized by the pc.
Okay, now finalizing the design. Newborn baby, NO TIME AT ALL.
AK4118 works fine alone, so does XMOS. Time to put everything together.
Variant1. A multiplexer, eg 74hc157, controlled with the duino. Pro: simple and will work 100%. Contra: longer wires, additional nasty proto board, one more chip to add jitter and interference.
Variant2. The XMOS module has the Z-capable output buffer, but the Z leg is bound to the gnd. I can cut it and control the tristate. Probably, the AK4118 goes high-Z when PDN is low (I do not know this, but this might work, see below). Pro: the board unchanged, just 4 additional wires from XMOS, looks nice, no new chip. Contra: none.
The question is: DOES the 4118 go high-Z when in powerdown? According to current consumption listed in the datasheet, it does. But no direct statement of this can be found.
Your suggestions, my friends?
AK4118 works fine alone, so does XMOS. Time to put everything together.
Variant1. A multiplexer, eg 74hc157, controlled with the duino. Pro: simple and will work 100%. Contra: longer wires, additional nasty proto board, one more chip to add jitter and interference.
Variant2. The XMOS module has the Z-capable output buffer, but the Z leg is bound to the gnd. I can cut it and control the tristate. Probably, the AK4118 goes high-Z when PDN is low (I do not know this, but this might work, see below). Pro: the board unchanged, just 4 additional wires from XMOS, looks nice, no new chip. Contra: none.
The question is: DOES the 4118 go high-Z when in powerdown? According to current consumption listed in the datasheet, it does. But no direct statement of this can be found.
Your suggestions, my friends?
I'm currently testing I2SoverUSB board by JLSounds on the 2xAK4399. I modified the Arduino program, in order to keep the AK4113 powered down by the PDN pin and use the DAC without sp/dif channels. The I2S signals I soldered directly on the pcb, at the resistors. This works fine. So I can confirm the AK4113 outputs are high-Z when pdn pin is low indeed.
Hello Nino, good to hear about this. Are you tracking DSD mode of I2SoverUSB for native DSD playback?
No, not implemented yet. 2xAK4399 would be capable of DSD64 playback, i2s layout of I2SoverUSB board is just right, no config needed.
In order to play DSD/PCM back&forth, the controller has to switch according to DSD/PCM pin on the USB board. Because the signals of the board to determine sampling rate and DSD/PCM aren't isolated from XMOS part, I'm designing a pcb to stack on top of the USB board, which will accommodate the Arduino Nano, isolator IC and all connectors. This because otherwise the galvanic separation between XMOS and clocks would be bridged by the Arduino, thus affecting performance of the USB board.
I decided to remove all sp/dif channels, because only one (very good) source is needed in my project setup, in fact I'm building a streamer DAC.
Regards, Nino
I asked because I plan to do something similar with my Amanero thus I may follow your code of DSD/PCM switch procedure. I2SoverUSB pin8 goes +3.3V for DSD, 0V for PCM but similar pin on Amanero goes to "1" for DSD, "0" for PCM according to their datasheets.I think you are going to track pin8 with Analogue outputs of Arduino whereas I should do same Digitally,if I understood the procedure correctly.
Actually I'm ok with onboard AK receiver which is very very good in my opinion but my ESI Waveterminal soundcard can't go beyond 48K in Linux (I'm using VDR as movie/tv/music playback frontend) due to driver restrictions. Another reason is; If I enclosure my dac project without USB, Amanero is going to be wasted and I don't want to this happen.
Regards.
Actually I'm ok with onboard AK receiver which is very very good in my opinion but my ESI Waveterminal soundcard can't go beyond 48K in Linux (I'm using VDR as movie/tv/music playback frontend) due to driver restrictions. Another reason is; If I enclosure my dac project without USB, Amanero is going to be wasted and I don't want to this happen.
Regards.
Oops. Just got the response from AKM on my inqiury a week ago.
They proved that MCKO and STDO are kept at 0 when PDN, and must be isolated with a mux.
As I do not get rid of spdif section, I'd better do what they say.
Nothing against AKM, but if that would be true, I wouldn't hear any sound coming out my DAC 🙂 But maybe AK4113 and AK4118 are different on this subject?
To Owners of Dual AK4299 Dac
Hi,
I am new to this thread and I am thinking of buying this board, without reading all the posts I hope you fellows can help me before I put in an order to purchase a unit. Any advice of the following would be appreciated:
1. Are there various versions of this board floating around, if yes which version should I look for?
2. Which op amps should I get with this board?
3. I play main via USB input, it the 7pin XMOS USB daughter board good enough? Is there more than 1 version?
4. Is there any real difference in sound quality between the single and dual AK4399?
5. Is this board fully recommended?
Any other advice is welcomed. Thanks.
Hi,
I am new to this thread and I am thinking of buying this board, without reading all the posts I hope you fellows can help me before I put in an order to purchase a unit. Any advice of the following would be appreciated:
1. Are there various versions of this board floating around, if yes which version should I look for?
2. Which op amps should I get with this board?
3. I play main via USB input, it the 7pin XMOS USB daughter board good enough? Is there more than 1 version?
4. Is there any real difference in sound quality between the single and dual AK4399?
5. Is this board fully recommended?
Any other advice is welcomed. Thanks.
Hi ttan98,
Nowadays there are more options indeed, JLSounds also released a dual AK4495 DAC.
@1: Two versions, 1 with AK4113 receiver and LM317/337 regs on output stage, 1 with AK4118 receiver with discrete regs on OS. Both versions have wrong voltage on TVDD pin of receiver chip. Both versions designs are weak 'out of the box'.
@2: personal taste, but don't forget the dual rail power supply regs
@3: USB board isn't that good, output is sp/dif, so no i2s advantages. With original controller, only sp/dif input is possible. For a few bucks more one can buy much better USB boards, with better support too. I use I2SoverUSB, it's a great board at reasonable price, with very good sp/dif output too.
@4: AK4399 in mono mode (the case with this dual DAC) has better dynamic range. But you won't hear much of a difference when using crappy output stage IMO.
@5: No, not fully. On the other hand, I've modified it a lot for more than a year already, and I stick to my plan of finishing it. It sounds very good to my ears... There are people doing great things with DAC chips with lower specs. If you like diy and cheap, buy a DAC and go experimenting with it. AKM DACs have great sound, you have plenty of options to tweak (opamp OS, discrete OS, transformer OS) and they require little filtering.
You can also try two single AK4x9x boards (of which the newer AK4495 is software controlled in single version too), and use a suitable USB audio board to split i2s to dual mono. It's up to you actually😉.
Nino
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